Thank you for reporting this bug and helping to make Ubuntu better. I was unable to reproduce this issue upgrading from 2.9.1-4 to 2.9.6-1~12.04.1. A simple upgrade (without overriding DEBIAN_FRONTEND, even) didn't prompt me at all.
Can you describe exactly what you are being prompted for? Please post exact steps to reproduce this problem on a different system. Once done, please change the bug status back to New. ** Changed in: postfix (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to postfix in Ubuntu. https://bugs.launchpad.net/bugs/1169044 Title: can't install/upgrade postfix non interactively through apt To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/postfix/+bug/1169044/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs